Effect of polar aprotic solvents on hydroxyethyl cellulose-based gel polymer electrolyte
Document Type
Article
Publication Date
1-1-2018
Abstract
Quasi-solid bioelectrolytes based on hydroxyethyl cellulose (HEC) and sodium iodide (NaI) in three different polar aprotic solvent systems, dimethylformamide (DMF), dimethyl sulfoxide (DMSO), and dimethylacetamide (DMA), were fabricated and characterized. FTIR studies revealed active solvent-ion interactions in DMF-based electrolytes in comparison to DMA and DMSO. The effect of the solvent system on the crystallinity of HEC gel electrolytes was more significant at low NaI concentration. In each solvent system, the highest ionic conductivity was achieved at 70 wt% NaI and generally DMF-based electrolytes showed higher conductivity than the other solvents. The availability of multiple complexation sites present in DMF is ascribed to improvement in ion mobility and hence conductivity. Rheological analysis was carried out to elucidate the mechanical properties of the gels. Generally, the mechanical strength of the polymer gels was unaffected by the type of solvent.
Keywords
Dimethyl sulfoxide, Dimethylacetamide, Dimethylformamide, Hydroxyethyl cellulose, Solvents
Divisions
foundation,CHEMISTRY
Publication Title
Ionics
Volume
24
Issue
7
Publisher
Springer Verlag (Germany)